Walk-behind lawn mower



FIG. 1 is a top, front, and right side perspective view of a walk-behind lawn mover showing my new design;

FIG. 2 is a front elevational view of FIG. 1;

FIG. 3 is a rear elevational view of FIG. 1;

FIG. 4 is a right side elevational view of FIG. 1;

FIG. 5 is a left side elevational view of FIG. 1;

FIG. 6 is a top plan view of FIG. 1;

FIG. 7 is a top, front, and right side perspective view of a walk-behind lawn mover showing a second embodiment of my new design;

FIG. 8 is a front elevational view of FIG. 7;

FIG. 9 is a rear elevational view of FIG. 7;

FIG. 10 is a right side elevational view of FIG. 7;

FIG. 11 is a left side elevational view of FIG. 7; and,

FIG. 12 is a top plan view of FIG. 7. 

The ornamental design for a walk-behind lawn mower, as shown. 